Forgetting mountain bikes, city bikes, cruiser bikes, beach bikes, fat tire, etc

well there's
Steel (lugged, brazed, tig'd), titanium and carbon tubed with carbon lugs, carbon monoquote...
fully custom frameset, semi-custom, off the peg, upgraded components

then there's
double, triple and compact double, 1/2 step + granny, and...

there's
downtube shifters, barend shifters, integrated shifters, electronic shifters

tune for the ride, there's
valley rides, hilly rides, mountainous rides, fast rides, loong rides, purely pleasure rides...

there's
tubing variations, geometry differences, 27"/700c/650b/etc
singles, tandems
diamond frame, recumbent
Campa/ShimaNo/SRAM, Suntour, Mavic, etc

Have I got your attention yet.

Something like Eddy rode, definitely one from Ugo's hand, can you say classic paint jobs?
54/10 for speed on a 16lb bike
Wheelsets = an addiction in and of itself.

Imagine the possibilities & combinations. And a retiree with a hobby that is actively outdoors and healthy.

Patina on anything over 30years old is ok, we just want to ride them all.
And we do not mind some maintenance, some wrenching, gluing tubulars, etc.

Pics make the post too long -